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Compare Keychron K3 Pro vs S1 Differences Side by Side

This comparison is for buyers deciding between two of Keychron's popular low-profile 75% keyboards. The choice is challenging because both share a compact layout, QMK/VIA programmability, and hot-swappable low-profile Gateron switches. The core trade-off is between the K3 Pro's multi-connectivity wireless design and the S1's focused, all-metal wired construction. Your decision hinges on whether portability and device switching or a premium, stationary typing experience is more important.

87
Keychron K3 Pro QMK/VIA Wireless Mechanical Keyboard ISO Layout Collection
85
Keychron S1 QMK Custom Mechanical Keyboard

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4.7 (52)
4.8 (18)
  • Built with the ISO, JIS, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ISO-UK, ANSI layout standard
  • Supports Bluetooth, Wired, Wireless, 2.4 GHz connectivity
  • Equipped with a 1550 mAh battery
  • Weighs about 930 g
  • Sized at 15 x 306 x 116 mm
  • Made with a Aluminum, Plastic, ABS case
  • Features ABS, PBT keycaps
  • Offers Yes, Rgb, South-face, Rgb South-face, White, North-face, Rgb North-face, White North-face RGB lighting
  • Built with the ANSI layout standard
  • Supports Wired, Wired only connectivity
  • Weighs about 960 g
  • Sized at 8 x 118 x 310 mm
  • Made with a Aluminum case
  • Features PBT keycaps
  • Offers Yes, Rgb, North-face, Rgb North-face RGB lighting
Scores
  • Performance: 81
  • Build Quality: 81.3
  • Productivity: 79.8
  • Customizability: 89
  • Portability: 77.2
Scores
  • Performance: 81.5
  • Build Quality: 81.5
  • Productivity: 80
  • Customizability: 89.5
  • Portability: 62.9
Name
Keychron K3 Pro
Name
Keychron S1
Release year
2022
Release year
2022
Switch Options
Linear, Tactile, Clicky
Switch Options
Linear, Tactile, Clicky
Profile
Low Profile
Profile
Low Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
75%
Layout Size
75%
Layout Standard
ISO, JIS, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ISO-UK, ANSI
Layout Standard
ANSI
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
Connection
Bluetooth, Wired, Wireless, 2.4 GHz
Connection
Wired, Wired only
Polling Rate
1000 Hz
Polling Rate
1000 Hz
Battery capacity
1550 mAh
Battery capacity
-
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
Tray Mount
Mount Style
Tray Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, South-face, White, North-face
Backlight
 
Rgb, North-face
Case Colors
Case Colors
Case Material
Aluminum, Plastic, ABS
Case Material
Aluminum
Keycaps Material
ABS, PBT
Keycaps Material
PBT
Dimensions
15 x 306 x 116 mm
Dimensions
8 x 118 x 310 mm
Weight
930g
Weight
960g
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Pros and Trade-offs

Your primary need dictates the choice. If you value the ability to move around wirelessly, switch between multiple devices, or use the keyboard with different computers, the Keychron K3 Pro is the logical pick. If you want a dedicated, premium keyboard for a single workstation where build material and a solid typing foundation are paramount, the all-metal Keychron S1 is the better investment. Both deliver excellent core performance for typing and gaming.

Keychron K3 Pro

  • +Offers triple connectivity: Bluetooth, 2.4 GHz wireless, and wired USB-C.
  • +Includes a 1550mAh battery for cordless operation.
  • +Supports a wide range of layout standards including ANSI, ISO, and several regional ISO variants.
  • +Features adjustable typing angles for ergonomic support.
  • +Vendor description confirms compatibility with both Mac and Windows, including keycaps for both.
  • −Case construction uses a combination of aluminum and ABS plastic, not full metal.
  • −The plate material is plastic, which may offer a different typing feel compared to metal.
  • −Battery life depends on usage patterns and requires periodic charging.

Keychron S1

  • +Constructed with a full CNC machined aluminum body for a premium, solid feel.
  • +Includes a steel plate, which typically provides a firmer, more consistent typing response.
  • +Offers two adjustable typing angles (3° and 6°) for ergonomic positioning.
  • +Vendor description states it is compatible with low-profile, XDA, and DSA profile keycaps.
  • −Wired-only connectivity (USB-C), lacking Bluetooth or wireless options.
  • −Only available in an ANSI layout, limiting regional compatibility.
  • −Slightly heavier at 960g, though the difference is minimal.

Which Keyboard Is Better for Your Needs?

The K3 Pro is the clear choice for mobile and multi-device workflows, winning in Office, Travel, and Content Creation due to its wireless features. The S1 takes the lead for Modding, thanks to its all-metal construction. For stationary, performance-focused tasks like Gaming and Programming, the keyboards are evenly matched, sharing core specs like polling rate and programmability, leaving the decision to a preference for wireless freedom or metal build quality.

GamingTie
  • •Both offer a 1000 Hz polling rate in wired mode for low latency.
  • •Both support N-key rollover for simultaneous key presses.
  • •The K3 Pro's wireless modes offer cable-free convenience, while the S1's all-metal build provides a stable, dedicated station.
OfficeKeychron K3 Pro
  • •The K3 Pro connects to up to 3 devices via Bluetooth for seamless switching between a laptop, phone, and tablet.
  • •Its wireless functionality and included Mac/Windows keycaps support hybrid work environments.
  • •The 1550mAh battery enables cordless use at a desk or in meetings.
ProgrammingTie
  • •Both keyboards have full QMK and VIA support for deep key remapping and macro programming.
  • •The 75% layout on both retains arrow and navigation keys while saving space.
  • •Hot-swappable sockets allow switch customization for preferred typing feel.
TravelKeychron K3 Pro
  • •The K3 Pro is wireless, eliminating the need to pack and manage a cable.
  • •It is slightly lighter at 930g compared to the S1's 960g.
  • •Bluetooth connectivity pairs easily with laptops or tablets on the go.
ModdingKeychron S1
  • •The S1 features a full CNC machined aluminum case and a steel plate for a more premium, moddable foundation.
  • •Its vendor description notes it is designed for easy assembly and customization of components.
  • •The plate-mounted stabilizers are specified, which are common targets for modders.
Content CreationKeychron K3 Pro
  • •Wireless connectivity via Bluetooth and a 2.4 GHz dongle reduces cable clutter on a production desk.
  • •Easy switching between a desktop for editing and a tablet for drawing references.
  • •Multimedia keys provide quick access to playback and volume controls.

Frequently Asked Questions (FAQ)

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